@article{ref1,
title="Mathematical aspects of a multi objective optimizing model proposed by Leininger et al",
journal="Accident analysis and prevention",
year="1971",
author="Joksch, H. C.",
volume="3",
number="3",
pages="209-213",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}